Help with a cash coin.

dia 23mm
wt 2.46 g
Any help would be great, thank you
yours daryl

Japan (Tokugawa Shogunate) 1 Mon; one of these types, check your coin's reverse:
https://en.numista.com/catalogue/index.php?mode=simplifie&p=1&l=japon&r=%E6%B0%B8&e=&d=&ca=3&no=&i=&v=&m=&a=&t=&dg=&w=&u=&f=&g=&c=&tb=y&tc=y&tn=y&tp=y&tt=y&te=y&cat=y

Thank you CassTaylor , There is nothing on the back. Sorry just came back in from trying to remove snow. # hours and when I came in it was blowing so much could not see a mile. Time to rest some.

@ALLRED1950 Glad I could help! Weather sounds terrible over there.

If there's nothing on the back it's probably this type:
https://en.numista.com/catalogue/pieces121572.html

since it's the only one where part of the character "永" ticks upwards like on your coin.